Certainly the central Platonic idea, which is the idea of the ideas, these archetypal forms which stand outside of time is one which is confirmed by the psychedelic experience.
Terence McKennaA long long time ago I took an oath to tell all secrets that came my way. Don't tell me a secret, I won't keep it. I'm against secrets, I'm against hierarchies, lineages, all assumption of special knowledge on the part of anyone in the presence of anyone else is abhorrent to me. I mean, I am a true anarchist first and foremost.
Terence McKennaActually, the highest form of human organization is not realized in the democratic individual. It is realized in a dimension none of us have ever penetrated, which is the mind of the species, which is actually the hand at the tiller of history. . . . It is an organized entelechy of some sort, and human history is its signature on the primates.
Terence McKenna